John f



(No Model.)

J. F. MAINS.

FUEL GAS BURNER.

No. 443,835. Patented Deo. 30V, 1890.

UNITED STATES PATENT OFFICE.

JOHN F. MAINS, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF THREEFOURTHS TOBRUCE CARR, HARVEY M. LA FOLLETTE, AND EDVARD J. ROBISON,

OF SAME PLACE.

FUEL-GAS BURNER.

SPECIFICATION forming part of Letters' Patent No. 443,835, datedDecember 30, 1890.

Application tiled October 27, 1890. Serial No. 369,445. (No model.) A

.To all whom it may concern:

Be it known that I, JOHN F. MAINS, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented a new and useful Improvement in Fuel-Gas Burners, of whichthe following' is a specification.

My invention relates to an improved burner for burning fuel-gas, of thatclass which conto sists of a hollow cast-plate having a gas-inlet on oneside and numerous small perforations through which the gas escapes onthe opposite side.

The object of my improvement is to so construct the opposite sides ofthe burner that they may be cast separately and then secured together insuch a manner as to prevent both from warping, and without the use ofscrews, bolts, rivets, or other separate parts.

zo The accompanying drawings illustrate my invention.

Figure l represents a front elevation; Fig. 2, a transverse section ata, Fig. l; and Fig. 3, a longitudinal section at b, Fig. 1. Fig. 4represents a front elevation of the back plate, and Fig. 5 an endelevation of the same. Fig. 6 is an elevation showing the back side ofthe front plate.

A is a recessed or dish-shaped castin forming the back plate of theburner, and having at its ends outwardly projecting lateral flanges c cand on one of its sides a similar flange (l. The other side of plate Ais provided with an inwardly-projecting flange e,

arranged in the same plane as flanges c c. The burner is designed tostand inclined at an angle of about forty-five degrees, as shown inFigs. 2 and 5, the side or edge having flange d being the upper edge andthat having ange e being the lower edge. 4o

F is an opening in plate A, adapted to be connected with the gas-supplypipe.

H is the top plate, having on its front side numerous projecting lugst', each lug having at its foot a perforation j ext-ending through theplate and forming an outlet for the gas.

The back side of plate H is provided with marginal ribs 7e 7o and l,having their inner edges grooved or undercut to receive the flanges c cand d of plate A, and having also 5o a rib m, whose outer edge issimilarly undercut to receive the flange e.

For the purpose of easily putting the plates A and H together with atight lit, both plates are tapered, being a little shorter on theirupper than on their lower edges. The plates being constructed as shownand described,

, are secured together by sliding plate H down JOHN F. MAINS.

Witnesses:

H. P. I-IooD, FRANK. A. JACOB.

